/*

 * Copyright (C) 2021 Huawei Device Co., Ltd.

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */
package com.cjj.refresh;

import ohos.agp.animation.Animator;

import java.math.BigDecimal;

/**
 * com.cjj.refresh
 *
 * @author Administrator
 * @since 2021/7/1
 */
public class DecelerateInterpolator implements Animator.TimelineCurve {
    private float mFactor = 1.0f;

    public DecelerateInterpolator(float factor) {
        mFactor = factor;
    }

    @Override
    public float getCurvedTime(float input) {
        float result;
        if (mFactor == 1.0f) {
            result = (float) (1.0f - (1.0f - (double) input) * (1.0f - (double) input));
        } else {
            double inputValue = Math.pow(new BigDecimal(1).subtract(new BigDecimal(input)).doubleValue(),
                    new BigDecimal(2).multiply(new BigDecimal(mFactor)).doubleValue());
            result = (new BigDecimal(1).subtract(new BigDecimal(inputValue))).floatValue();
        }
        return result;
    }
}
